This section is from the "Elixirs And Flavoring Extracts. Their History, Formulae, & Methods of Preparation" book, by John Uri Lloyd. Also available from Amazon: Elixirs and flavoring extracts,: Their history, formulae, and methods of preparation;
Elixir of phosphate of quinine, elixir of phosphate of cinchonidine, and elixir of phosphate of cinchonine, of each equal amounts by measure.
Mix them together.
Each fluidrachm (teaspoonful) of the finished elixir contains of phosphate of quinine an amount which is equivalent to one-third of a grain of quinine, and of phosphate of cinchonidine an amount which is equivalent to one-third of a grain of cinchonidine, and of phosphate of cinchonine an amount which is equal to two-thirds of a grain of cinchonine.